Circuit-breaker relay.



W. KAISLING.

CIRCUIT BREAKER RELAY.

APPLICATlON FILED FEB. I. I915.

1. 32 1,452 Patented Dec. J, 1919.

E 1: 22272755555." ZfiL/EZYZEZ'K' 5m Wham/(525g Application filed Febreer 1 aZZ whom it may concern:

Be it known that 1, WILLIAM citizen of the United States of ice. residinfl' in Chicago, county of Cook, and ate of Ii inois have invented certain new nd useful Improvements in Circuit-Browser Re lays, of which the followingis tion.

My invention relates to circuit lays and more particularly to dev solenoid type although certain my invention are not limited to this ticulartype. In conneciion Wi v newer c cuits such as are used on autouiob es uh include the ignitiomlightiug, starting. eha ing circuits, etc, oxerload circuit hre- 'cr relays are introduced in the mair pom r lead, which remain inert as long as not more than a predetermined amount currene flows but whicn operate to interrupi. the cuit and vibrate their armature as an 1 cation thereof, when a greater amount the predetermined flow of current traverses the coil of the relay.

One of the object-s of my invention is to provide improved and simplified device of this ch racter having certain electrical 0 l SID 81612163.

and mechanical advantage. Uue of the features of my invention resides in an unproved arrangement whereby an of currentwill traverse a low resis r. path through the electromagnet followed bythe introduction of a high resistance encrgizing circuit which produms a vibration of ihe armature to indicate the excessive flow. Other features will he more particularly pointed out in the ensuing part or the specification. and claims. For a better un derstanding of my invention reference had to the accompanying drawing in Wu cl:- I

Figure 1 is a side elevation the preferred form of my invention;

Fig. 2 is a lefi, end view of Fig. 1;

Fig. 3 is a right end View of .l; Fig. 4% is a cop or plan View of Fig. 1; Fig. y l

the il 0 is a sectional View through mounting of the consact springs along line 5, 5 of 4:; r Fig. ,6 is a longitudinal sectional along the line 6, 6 of Fig. 4;

Fig. if shows the device Fig. 1 with its armature in a partially attracted posiiziou; Fig. 8 shows the armature fully attracled;

is side View of a modified form IUVGHUOH;

ed i orzu of .LI cleci'roinagneh .iic maratively 'IlOW alively high re- I 1 i wh ch are supported upon a tuv 1 irm'crahly of non-magnetizahle malcrial. A rear core 3 is ulaced with in 'lhe lube and rigri-zllj." secured :55 a heel iron or rclum pole piece 7 carrying}; an armature 3.0 a'l its forward sud. Said arnmrurois pi"- 0111.. "y suppori'ed by means or a pin 1% which is securely clamped in a transverse slot 21 in the armature by means oi went 13 secured by screws 15. ill? the for-- Ward end of he cleclromagnet a core 9 is i .d heing slidahly supported within t l and opcraiivcl attached to armature 10 by means of a screw 11 preferahly a nou-maguei'izahle material said SLI'QYV exicuding l'lliOllQ'lk a sloi; 22 at the hirer end 0 he armature and so adjusted as To allow slighli independent movement of the armmurc. 1i. separator Washer 12 uaieralzly of non-iuac'iielizable material is 'i'zseried between ihc armature l0 and mov- Te core 9 so as lo prevent freezing. The core 3 is held in (i931! relation to the by means of a pin springs are provided comprising the armeuoi'e par'iicuiarly in mg. 5. A stop is also provided for controlling the up movement of the intermediate 4 ,il. rearu'urdly extending arm 213 ledk-arrying an insulating huil'er 25 for actuafing: the coui'act springs, ears 113 or. the exlcusion 2135 EQSilil on each side of ihe slot 7 in the heel on. The stu liouary confine?" 18 carries a forwardly positioned icriuiual 11R extending through slot '7 and adapted to heronnm-Wd lo one terminal of each oi the windings as (liagrau'lmatuallv illustraied m Fig. 12. The other terminal 2? oi the low resistance Winding "i0 is a top or plan view of Fig. 9; 11 is a right end View 9; and ii, illusti res diagramn'udially the connected in a power circuit. rriug now more par: cularly to the a clamping ele set of l lu'ee normally closed contact invention illustrated 2, is adapted to be connected to an outside conductor and the contact spring 16 is connected to a rearwardly extending terminal 19 adapted also for connection to an outside conductor.

In the preferred method of connecting the device, one terminal of each of the windings is connected to the terminal 118 of contact 18, the other terminal of winding 2 belug connected directly to one terminal of the circuit. The other terminal 36 ofthe high resistance winding extends through a hole 37 in the heel iron and is connected to the intermediate contact 17. Thus it will be seen that with the relay in its normal position the high resistance winding is shortcircuited due to contacts 17, 18 being normally connected so that normally the protected circuit includes only the low res1stance winding 2. The relay is adjusted so that it will not attract its armature su'lhciently to interrupt contacts 17, 18 so long as the normal or predetermined amount of current is flowing, F or the purpose of illustration, I have shown the circuit breaker relay diagrammatically in Fig. 12 and tor simplicitys sake I have shown only one lamp in circuit with the circuit breaker relay. Should something happen to this circuit so that its resistance is lowered a predetermined extent, the increased flow of current through winding 2 draws in the movable core 9 and attached armature 10. The core 9 and armature 10 upon being attracted 1mn'iediately interrupt contacts 17, 18 so that the shunt across the terminals of high resistance winding 1 is interrupted thereby 1neluding this winding in series with winding 2 and thus in the protected circuit. The core and arn'iature continue in their attracting movement and upon reaching the ntermediate position as shown 1n 1*1g. l, intermediate'cont act 17 engages its stop 21 so that the continued movement ot the armature (the core 9 being fully attracted) causes the armature contact spring 16 to leave contact 17 thus interrupting the circuit through the windings of the relay. At this time (Fig. 8) both armature and core 9 are fully attracted and the interruption of the energizing circuit for the relay allows the armature to retract so that due to the slight playbetween the armature and the head of screw 11, said armature retracts sufficiently to again close contacts 16, 17 only, without moving core 9; Therefore the armature immediately 1s attracted to again interrupt the energizing circuit. As long as the increased flow of current exists the armature continues to vibrate on an energizing circuit including both windings of the relay and contacts 1?), 17 only, and as this energizing circuit 1s of comparatively high resistance I have found that this vibration may continue for some time without-atfecting the relay. The high resistance winding 1 of the circuit breaker relay when placed in series relation with the low resistance winding 2 reduces the current flow. as previously described, but permits sutlicient current to traverse the series connccted windings to bring about the full attraction of the armature 10. The reduction of. current flow due to the high resistance windin 1 also reduces the sparking at the interrupter contacts 16 and 17 to a mininnun. The vibration of the armature produces an audible signal so that the operator knows the circuit has been aliected in some way. It the circuit is then opened the relay will deenergize and restore its armature and contacts. It the circuit is again closed and the increased flow of current still exists the relay will vibrate as before.

In Figs. i) to 11, T have illustrated a modified form of my invention the principal difference between this form and the first described consisting in. the absence of the central slot 7 in the heel piece. That is, in this modified torm the rearwardly extending arm 213 carried by the armature rests directly upon the heel iron 7 and instead of extending theterminal 118 through the center of the heel iron it overlaps one side of the heel iron and extends downwardly through a slot 107 to be attached to the ter- I'ninal ot the low resistance winding. In this modified form of my invention I have indicated the. parts thereoi which are similar to parts or the prelcrrcd form, by like reference characters except tor the addition ol the sntfix prime.

In working out my invention 1 have embodied it in several different mmlifications but Lcontcmplate employing the ditl'erent l'eatures in other ways than that shown. It will also be apparent that changes and modifications will readily occur to those skilled in the art and therefore I do not desire to be limited to the exact structure as shown and described but aim to cover all that which comes within the spirit and scope of the appended claims.

Having described my invention what I claim as new and desire to secure by United States Letters Patent, is

1. A circuit-breaker relay including an electromagnet having high and low resistance windings, normally closed contacts for said relay, a shunt about said high resistance winding including certain of said contacts, a circuit for said relay including certain of said first contacts and said low resistance winding, an armature for said relay adapted to be attracted when said circuit is closed to operate said shunt contacts to remove raid short-circuit from about said high resistance winding thereby including said high resistance winding in circuit with said low resistance winding causing a further operation of said armature to open the contacts included in the initial energizing circuit of said relay.

2. A circuit breaker relay including an electromagnet having two windings, contacts for said relay normally sho'rt-circuiting one of said windings, an initial energizing circuit for said relay including the other winding and other normally closed contacts of said rela whereby a flow of current through sai second winding and its included contacts affects the first said contacts to interrupt the short circuit so that both windings are included in circuit with said second mentioned contacts, and means whereby a continued application of current operates to intermittently open and close said second mentioned contacts only.

3. A circuit breaker including an electromagnet having two windings, an armature for said magnet, contacts controlled by said armature and normally short-circuiting one of said windings, other normally closed contacts, circuit connections including the other of said windings and said other normally closed contacts adapted to be closed to cause an initial operation of said armature to open said first normally closed contacts, thereby rendering said first winding effective to' cause a continued attracting movement of said armature whereby the other of said contacts are interrupted to open the circuit c, both of said windings, said armature upon retracting again closing the circuit for both of said windings tocause a reattraction thereof without again closing said short circuit.

4. A circuit breaker relay including an electromagnet provided with highand low resistance windings, a contact for said relay normally shunting the high resistance winding, an interrupter contact for said relay adapted to be included in circuit with said windings, an armature for said relay, and circuit connections including the said low resistance winding and said interrupter con tact whereby a flow of current through said low resistance winding operates said armature to open said shunt circuit and to include said pair of windings in circuit with said interrupter contact to cause an intermittent operation of said relay.

5. A. relay of the class described including an electromagnet having high and low resistance windings, a contact for said relay normally closing a shunt circuit around said high resistance winding, an interrupter contact normally in circuit with said low resistance winding, means whereby when an abnormal flow of current through said low resistance winding occurs said shunt circuit contact is operated and said windings are connected in series circuit to cause a continued operation of said relay to open said interrupter contact, thereby interrupting the circuit of said windings and causing said relay to operate as a buzzer to give an audible signal.

6. The combination wlth a relay structure of the character described including an electromagnet provided with a pair of windings, of a plurality of contacts for said relay, two of said contacts closing a shunt circuit around one of said windings, and a third one of said first contacts and one of said shunting contacts included in an interrupter circuit for said pair of windings.

7. A relay of the class described including an electromagnet provided with a pair of windings, an armature for said relay, contacts for said relay controllable by said armature, a shunt circuit around one of said windings including two of said contacts, and a circuit including a third one of said first contacts, one of, said shunting contacts and said pair of windings.

Signed by me at Chicago, county of Cook 

